<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>Carson_Ho</title>

</head>
<body>
<script type="text/javascript">
        function addAll(){
            var total = 30;
            var str = "Ran 5 hours,<br> finally finished the ";
            document.write("<html><b> "+ str + total + " km!"</b></html>);
            }
    </script>
</body>

</html>